Please hurry. only choose one!! Trailblazing South Korean boy band BTS rose to the top of the U. S. charts with their first all-English song, and the socially conscious septet's latest triumph could herald a historic shift in music.

a. But the entirely English lyrics of "Dynamite" make it radio-friendly in Anglophone countries — bypassing a hurdle faced by another recent South Korean cultural phenomenon, the subtitled Oscar-winning movie "Parasite."

b. Even so, the group's Billboard feat means the era of the West "dominating the world's popular music is truly coming to an end," CedarBough Saeji, a visiting professor at Indiana University-Bloomington, told AFP.

c. Group leader RM said that the lightheartedness of "Dynamite," as well as elements of disco-pop that make it "easy to sing along or hum along with," contributed to its historic success in the U. S.

d. According to experts the song was carefully and commercially planned to target the Billboard ranking, which blends U. S. streaming, radio airplay and digital sales data to determine the top hits.